linux-kernel - Re: [RFC PATCH 0/4] Gang scheduling in CFS

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Date:	Tue, 27 Dec 2011 12:53:33 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com>
CC:	Ingo Molnar <mingo@...e.hu>, peterz@...radead.org,
	linux-kernel@...r.kernel.org, vatsa@...ux.vnet.ibm.com,
	bharata@...ux.vnet.ibm.com
Subject: Re: [RFC PATCH 0/4] Gang scheduling in CFS

On 12/27/2011 12:43 PM, Nikunj A Dadhania wrote:
> > > > Interesting, are you overcommitting vcpus?
> > > > 
> > > Yes(1:2). On a 8cpu machine, have 2VMs running, which is 8vcpus each.
> > 
> > Ah, yield_on_hlt=0 isn't any good with overcommit.  The vcpu stays
> > scheduled when idle, so other vcpus don't get to use its cpu time.
> > 
> This is similar to booting the guest with idle=poll kernel parameter?

Yes, only with lower power consumption.

-- 
error compiling committee.c: too many arguments to function

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